Abstract: In order to explore the law of drainage and decompression of the slope in the deep excavated rocky section of a channel in Jiaodong Water Diversion Project, according to the hydrogeological exploration parameters and the channel section size, a sand tank experimental model was designed, and the drainage and decompression experiments of various schemes such as no drainage system, single slope drainage system, single bottom drainage system, and dual drainage system at the bottom and slope were carried out.The results showed that under the condition of the highest recorded groundwater level, for the same drainage system, the uplift pressure of the side with catchment pipe was 29.0%～43.7% lower than that of the side without catchment pipe.For different drainage systems, the dual drainage system at the bottom and slope of the channel had the best decompression effect, the decompression range can reach 37.9% compared with the non-drainage system but with the catchment pipe, and the decompression range can reach 55.2% compared with the non-catchment pipe.Among different drainage systems, the drainage effect of the double drainage system was the best, which was 2.5 times and 1.1 times than that of the single slope drainage system and the single bottom drainage respectively.In the double drainage system, the drainage volume of channel bottom drainage device accounted for 82.02%～90.91%,which was much larger than that of slope drainage device.Based on the experimental results, it is concluded that for the deep excavated rocky channel section with developed cracks, it is appropriate to design a dual drainage system of channel bottom and slope network connected by vertical and horizontal drainage pipes and drainage devices to reduce the uplift pressure damage of lining structure.